Obviously this is a random question but someone here might know: I have a new(ish) phone that has a USB-C connector. Since all of my other phones in recent years have been standard micro USB connectors, I had a plethora of those cables around - enough to have them in each vehicle, in my laptop bag, desk, kitchen counter, junk drawer and a few backups... you get the idea. So I ordered a half-dozen cheapo USB-C cables when I got my phone and I've noticed that they do not charge fast enough to keep up with the phone's usage - if I plug in any cable except the HTC one that came with my phone, it registers that it is charging, but I get error messages that it is charging slowly. On the road, if I have music, GPS and Bluetooth going, I can actually drain the battery while the charger is connected. To be clear, I am talking about the cable that has a standard USB plug on one end and a USB-C on the other - regardless of which wall adapter, computer or 12v adapter I connect the USB end to, I get slow charge with all six cheap cables and normal charge with the HTC Cable. OK, that isn't a question, I know, but here is the two-part question: 1) Why is this? I thought a cable had a connector on one end, some wire and a connector on the other end (maybe some magic directional wire if it is a guitar cable) but still, shouldn't a charging cable either be connected or not connected? 2) Does anyone know of a way to tell before buying and trying a bunch which ones will work? I bought a half dozen that don't work for $5 bucks and I have seen brand-name ones ranging from $15-$30 dollars. I would spend 10-15 bucks for a spare 'good' cable if I knew it was going to work but can't bring myself to spend $30 and really don't want to spend $10 unless I know it will work?